Polished fossil stromatolite. SD160 slab polished on one side.
Sections consist of a chaotic mixture of dolomite and/or stromatolite fragments set in a matrix of mudstone and/or coarsely crystalline dolomite .
The pink and red colouration can be attributed to the presence of finely disseminated iron oxides . It often contain layers and nodules of red chert.
From the Irregully Formation, Western Australia.
Dimensions approximately 100mm x 85mm x 8mm thick
Weighs 165grams
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